Nordyne 661040R Orifice

The Nordyne 661040R Orifice is a precision-engineered #40 LP gas burner orifice with a .040-inch diameter, specifically calibrated for liquid propane applications in residential and light commercial furnaces. For technicians managing Nordyne furnace repair or LP conversions, this component is essential for regulating fuel delivery to the burner assembly. Proper gas metering ensures the air-to-fuel ratio remains within manufacturer specifications, preventing common field issues such as soot accumulation from over-firing or unstable flames from under-firing. This OEM replacement part is built to maintain tight tolerances under high thermal stress, ensuring consistent manifold pressure and reliable ignition across HVAC cycles. Integrating this furnace burner orifice into your maintenance routine guarantees that the system meets its rated BTU input while optimizing combustion efficiency. When troubleshooting furnace performance, verifying the orifice size against the rating plate is a critical step for system safety and operational longevity in propane-fired equipment.

Key Benefits:

• Precision-drilled #40 (.040) orifice diameter for accurate liquid propane fuel metering.
• Direct compatibility with Nordyne heating systems and Miller/Intertherm gas valves.
• Optimizes the combustion process to maintain stable flame patterns and efficient heat exchange.
• Durable brass construction resists corrosion and maintains port integrity over time.
• Essential component for LP conversion kits and manifold pressure adjustments.

Common Questions:

What is the drill size for the Nordyne 661040R?
This part features a #40 drill size, which corresponds to a .040-inch opening, specifically designed for LP gas flow rates.

Can this orifice be used for natural gas systems?
No, this orifice is sized exclusively for liquid propane (LP). Natural gas requires different metering diameters to maintain the correct BTU input and safety margins.

How do I verify if this orifice fits my furnace?
Check the equipment rating plate for the manifold pressure and required orifice size based on your altitude and fuel type to confirm the 661040R matches the specs.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.